<div class="csl-bib-body">
<div class="csl-entry">Käding, C. (2022, May 24). <i>Directly computing reduced density matrices with influence functionals</i> [Conference Presentation]. Quantum Field Theory in Curved Spacetimes Workshop (QFTCS Workshop), Spain. http://hdl.handle.net/20.500.12708/139474</div>
</div>
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/139474
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dc.description.abstract
The field theory of open quantum systems already has ample applications in physics with non-flat backgrounds, e.g. for inflation, black holes or quantum experiments in space. Open quantum systems are commonly described by reduced density matrices, which are obtained by tracing out the environmental degrees of freedom, and whose evolution is given by quantum master equations. Solving such equations often poses an intricate or even impossible task. In this talk I am going to present a practicable formalism which allows for the direct computation of reduced density matrix elements
without having to consider a master equation. It is based on techniques from non-equilibrium QFT like thermo field dynamics, the Schwinger-Keldyh formalism and the Feynman-Vernon influence functional. The presented results are an early step in a research program that will unravel even more intimate relations between QFT of open systems and QFT in curved spacetimes.
en
dc.language.iso
en
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dc.subject
open quantum systems
en
dc.subject
quantum field theory
en
dc.subject
path integrals
en
dc.subject
density matrices
en
dc.title
Directly computing reduced density matrices with influence functionals
en
dc.type
Presentation
en
dc.type
Vortrag
de
dc.type.category
Conference Presentation
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tuw.researchTopic.id
Q6
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tuw.researchTopic.id
X1
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tuw.researchTopic.id
A3
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tuw.researchTopic.name
Quantum Many-body Systems Physics
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tuw.researchTopic.name
Beyond TUW-research foci
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tuw.researchTopic.name
Fundamental Mathematics Research
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tuw.researchTopic.value
45
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tuw.researchTopic.value
30
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tuw.researchTopic.value
25
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tuw.linking
https://sites.google.com/view/qftcsworkshop/home
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tuw.publication.orgunit
E141-04 - Forschungsbereich Neutron- and Quantum Physics
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tuw.author.orcid
0000-0002-1781-2609
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tuw.event.name
Quantum Field Theory in Curved Spacetimes Workshop (QFTCS Workshop)
en
tuw.event.startdate
23-05-2022
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tuw.event.enddate
27-05-2022
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tuw.event.online
Online
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tuw.event.type
Event for scientific audience
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tuw.event.country
ES
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tuw.event.presenter
Käding, Christian
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tuw.presentation.online
Online
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tuw.event.track
Single Track
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wb.sciencebranch
Physik, Astronomie
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wb.sciencebranch.oefos
1030
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wb.sciencebranch.value
100
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item.fulltext
no Fulltext
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item.grantfulltext
none
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item.openairetype
conference paper not in proceedings
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item.openairecristype
http://purl.org/coar/resource_type/c_18cp
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item.languageiso639-1
en
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item.cerifentitytype
Publications
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crisitem.author.dept
E141-04 - Forschungsbereich Neutron- and Quantum Physics